As filed with the Securities and Exchange Commission on March 27, 2023. Registration Statement No. 333-270107 (Exact name of Registrant as specified in its charter) Not Applicable (Translation of Registrant's name into English) Cayman Islands 7370 Not Applicable (Primary Standard Industrial Classification Code Number) Room 5A01, 4th Floor, Air China Building, Xiaoyun Road, Sanyuanqiao, Chaoyang District, Beijing 100027, China (86) 18500976532 (Address, including zip code, and telephone number, including are ...